WO2018110109A1 - Bloc-batterie et système de source d'alimentation le comprenant - Google Patents

Bloc-batterie et système de source d'alimentation le comprenant Download PDF

Info

Publication number
WO2018110109A1
WO2018110109A1 PCT/JP2017/038658 JP2017038658W WO2018110109A1 WO 2018110109 A1 WO2018110109 A1 WO 2018110109A1 JP 2017038658 W JP2017038658 W JP 2017038658W WO 2018110109 A1 WO2018110109 A1 WO 2018110109A1
Authority
WO
WIPO (PCT)
Prior art keywords
switch
connection circuit
storage battery
rotating electrical
electrical machine
Prior art date
Application number
PCT/JP2017/038658
Other languages
English (en)
Japanese (ja)
Inventor
祐樹 前田
Original Assignee
株式会社デンソー
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社デンソー filed Critical 株式会社デンソー
Publication of WO2018110109A1 publication Critical patent/WO2018110109A1/fr

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/42—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by the architecture of the hybrid electric vehicle
    • B60K6/46—Series type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
    • B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
    • B60R16/03—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for
    • B60R16/033—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for characterised by the use of electrical cells or batteries
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
    • B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
    • B60R16/04—Arrangement of batteries
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
    • B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
    • B60W10/06—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of combustion engines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
    • B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
    • B60W10/08—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of electric propulsion units, e.g. motors or generators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W20/00—Control systems specially adapted for hybrid vehicles
    • B60W20/50—Control strategies for responding to system failures, e.g. for fault diagnosis, failsafe operation or limp mode
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/44—Methods for charging or discharging
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/14—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from dynamo-electric generators driven at varying speed, e.g. on vehicle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/10—Electric propulsion with power supplied within the vehicle using propulsion power supplied by engine-driven generators, e.g. generators driven by combustion engines
    • B60L50/16—Electric propulsion with power supplied within the vehicle using propulsion power supplied by engine-driven generators, e.g. generators driven by combustion engines with provision for separate direct mechanical propulsion
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

Definitions

  • This disclosure relates to a battery pack that is electrically connected to a rotating electrical machine, and a power supply system including the battery pack.
  • Patent Document 1 a vehicle power supply device in which a first power supply and an MGU are electrically connected via a battery pack is known.
  • the battery pack has a first power switch SW and a first bypass relay.
  • the first power switch SW and the first bypass relay are connected in parallel.
  • a third fuse is connected in series to the first power switch SW.
  • a second fuse is connected in series to the first bypass relay. Therefore, the first power supply and the MGU are electrically connected via at least one of the first power supply switching SW and the third fuse, and the first bypass relay and the second fuse.
  • This disclosure is intended to provide a battery pack in which the occurrence of damage in the second connection circuit is suppressed and the increase in cost is suppressed, and a power supply system including the battery pack.
  • the battery pack is a battery pack that electrically connects the storage battery and the rotating electrical machine, the first connection circuit that connects the storage battery and the rotating electrical machine, and the storage battery and the rotating electrical machine.
  • a second connection circuit having a lower current resistance than the first connection circuit, a control unit for controlling the first connection circuit and the second connection circuit, and a sensor unit for detecting an abnormal state of the first connection circuit; Have.
  • the control unit has a first threshold value and a second threshold value larger than the first threshold value as threshold values for determining an abnormality of the first connection circuit, and the sensor value indicated by the sensor unit has the first threshold value. If it exceeds, the required output of the rotating electrical machine is limited, and if the sensor value exceeds the second threshold value, the second connection circuit is closed while the first connection circuit is opened and the second connection circuit is closed.
  • the storage battery and the rotating electrical machine are electrically connected via
  • the power supply system includes a storage battery, a rotating electrical machine, and a battery pack.
  • the battery pack includes a first connection circuit that connects the storage battery and the rotating electrical machine, a second connection circuit that connects the storage battery and the rotating electrical machine and has a lower current resistance than the first connection circuit, a first connection circuit, and a first connection circuit.
  • a control unit that controls each of the two connection circuits; and a sensor unit that detects an abnormal state of the first connection circuit.
  • the control unit has a first threshold value and a second threshold value larger than the first threshold value as threshold values for determining an abnormality of the first connection circuit, and the sensor value indicated by the sensor unit has the first threshold value. If it exceeds, the required output of the rotating electrical machine is limited, and if the sensor value exceeds the second threshold value, the second connection circuit is closed while the first connection circuit is opened and the second connection circuit is closed.
  • the storage battery and the rotating electrical machine are electrically connected via
  • the required output of the rotating electrical machine is limited. Therefore, the current flowing through the second connection circuit when the sensor value exceeds the second threshold can be reduced. For this reason, even if a second connection circuit having a lower current resistance than that of the first connection circuit is employed, damage to the second connection circuit is suppressed. Moreover, since a thing with low electric current resistance can be employ
  • FIG. 1 It is a block diagram which shows schematic structure of a power supply system and a battery pack. It is a schematic diagram which shows the electric power feeding from the lithium storage battery to the rotary electric machine of a power running state. It is a schematic diagram which shows the state in which the request output of the rotary electric machine fell in the electric power feeding state shown in FIG. It is a schematic diagram which shows the state which performed the fail safe process in the state which is electrically feeding to a rotary electric machine. It is a schematic diagram which shows the electric power feeding from the lead storage battery to the rotary electric machine of a power running state.
  • FIG. 1 It is a block diagram which shows schematic structure of a power supply system and a battery pack. It is a schematic diagram which shows the electric power feeding from the lithium storage battery to the rotary electric machine of a power running state. It is a schematic diagram which shows the state in which the request output of the rotary electric machine fell in the electric power feeding state shown in FIG. It is a schematic diagram which shows the state which performed the fail safe process
  • FIG. 6 is a schematic diagram illustrating a state in which the required output of the rotating electrical machine has decreased in the power supply state illustrated in FIG. It is a schematic diagram which shows the electric power supplied from the rotary electric machine of an electric power generation state. It is a schematic diagram which shows the state in which the request output of the rotary electric machine fell in the electric power feeding state shown in FIG. It is a schematic diagram which shows the state which performed the fail safe process in the state which the rotary electric machine is generating electric power. It is a schematic diagram which shows the electric power feeding state of the power supply system at the time of idle stop. It is a schematic diagram which shows the electric power feeding to the rotary electric machine at the time of the engine restart by a rotary electric machine.
  • the power supply system 200 is mounted on a vehicle.
  • the power supply system 200 includes a battery pack 100, a lead storage battery 110, a rotating electrical machine 120, an engine 130, an electric load 140, and a host ECU 150.
  • a vehicle equipped with power supply system 200 has an idle stop function of stopping engine 130 when a predetermined stop condition is satisfied and restarting engine 130 when a predetermined start condition is satisfied.
  • the lead storage battery 110 and the rotating electrical machine 120 are electrically connected via the battery pack 100.
  • the lead storage battery 110 and the electric load 140 are electrically connected via the battery pack 100.
  • the host ECU 150 is electrically connected to each of the lead storage battery 110 and the battery pack 100 via wiring (not shown). With the above electrical connection configuration, each of the rotating electrical machine 120, the electrical load 140, and the host ECU 150 can be fed from at least one of the lead storage battery 110 and the battery pack 100.
  • the lead storage battery 110 is electrically connected to the battery pack 100 via the first fuse 111.
  • the electric load 140 is electrically connected to the battery pack 100 via the second fuse 112.
  • the lead storage battery 110 generates an electromotive voltage by a chemical reaction.
  • the lead storage battery 110 is connected to the battery pack 100 via a wire harness.
  • the lead storage battery 110 corresponds to a storage battery.
  • Rotating electric machine 120 is connected to an inverter (not shown).
  • This inverter is connected to the battery pack 100 via a wire harness.
  • the inverter converts the DC voltage supplied from the battery pack 100 into an AC voltage.
  • This AC voltage is supplied to the rotating electrical machine 120. Thereby, the rotating electrical machine 120 is powered.
  • the rotating electrical machine 120 is connected to the engine 130.
  • the rotating electrical machine 120 and the engine 130 can transmit rotational energy to each other via a belt or the like.
  • the rotational energy generated by the power running of the rotating electrical machine 120 is transmitted to the engine 130. Thereby, rotation of engine 130 is promoted.
  • vehicle travel is assisted.
  • a vehicle equipped with the power supply system 200 has an idle stop function.
  • the rotating electrical machine 120 not only assists the vehicle travel, but also functions to rotate the crankshaft when the engine 130 is restarted.
  • Rotating electric machine 120 also has a function of generating electric power by at least one of rotational energy of engine 130 and rotational energy of vehicle wheels.
  • the rotating electrical machine 120 generates an AC voltage by power generation. This AC voltage is converted into a DC voltage by an inverter. This DC voltage is supplied to the battery pack 100 and the lead storage battery 110.
  • Engine 130 generates vehicle propulsion by driving fuel to burn.
  • a starter is mounted on the vehicle. This starter is electrically connected to the lead storage battery 110.
  • the crankshaft is rotated by the starter.
  • the rotating electric machine 120 rotates the crankshaft.
  • the electric load 140 is required to have a constant power supply.
  • the electric load 140 is a navigation system, audio, EPS, ABS, or the like.
  • the electrical load 140 has a property of switching from the on state to the off state when the supply voltage falls below the threshold voltage.
  • the host ECU 150 transmits / receives signals to / from various ECUs such as other battery ECUs mounted on the vehicle via the bus wiring 151 and the BMU 50 of the battery pack 100 described later, and controls the vehicle in a coordinated manner.
  • the host ECU 150 receives the accelerator pedal depression amount and throttle valve opening detected by a sensor (not shown), and the output voltage and current of the lead storage battery 110 indicating the state of charge of the lead storage battery 110. .
  • information on the battery pack 100 is also input to the host ECU 150.
  • the host ECU 150 outputs a command signal to the BMU 50 based on such information. Based on this command signal, the BMU 50 controls a switch 20 and a bypass relay 30 of the battery pack 100 described later.
  • the host ECU 150 corresponds to a host controller.
  • the battery pack 100 has external terminals 100a, 100b, and 100c.
  • the external terminals 100a, 100b, and 100c are mechanically and electrically connected to at least one of the ends of the corresponding wire harness by screwing and welding.
  • a wire harness coupled to the lead storage battery 110 is mechanically and electrically connected to the first external terminal 100a.
  • a wire harness coupled to the rotating electrical machine 120 is mechanically and electrically connected to the second external terminal 100b.
  • a wire harness connected to the electrical load 140 is mechanically and electrically connected to the third external terminal 100c.
  • the battery pack 100 is mechanically and electrically connected to the lead storage battery 110, the rotating electrical machine 120, and the electric load 140 via the wire harness.
  • the battery pack 100 has a plurality of bus bars.
  • One end of the bus bar is connected to the external terminals 100a, 100b, and 100c.
  • one end of the bus bar constitutes at least a part of the external terminals 100a, 100b, 100c.
  • the other end of the bus bar is connected to a substrate included in the battery pack 100. An electric circuit is formed on this substrate.
  • the battery pack 100 includes a lithium storage battery 10, a switch 20, a bypass relay 30, a sensor unit 40, and a BMU 50.
  • the switch 20, the bypass relay 30, and the BMU 50 constitute a part of the above electric circuit.
  • the lithium storage battery 10 and the sensor unit 40 are electrically connected to this electric circuit. At least a part of the sensor unit 40 may constitute a part of the electric circuit.
  • the battery pack 100 has a housing (not shown). This housing is produced by aluminum die casting. A lithium storage battery 10, a switch 20, a bypass relay 30, a sensor unit 40, and a BMU 50 are housed in the housing together with the substrate and the bus bar. The housing functions to dissipate heat generated in the lithium storage battery 10 and the substrate 20. The housing is provided below the seat of the vehicle.
  • the switch 20 need only be electrically connected to the substrate and may not be directly mounted.
  • the switch 20 is mounted on a housing. Thereby, the switch 20 and the housing are thermally connected. The heat generated in the switch 20 actively flows to the housing instead of the substrate. Thereby, heat dissipation of the switch 20 is promoted.
  • the lithium storage battery 10 generates an electromotive voltage by a chemical reaction.
  • the lithium storage battery 10 has a plurality of battery cells connected in series.
  • substrate are located in a line with the horizontal direction.
  • the lithium storage battery 10 and the substrate are arranged in the vertical direction.
  • the horizontal direction and the vertical direction are directions for explaining the arrangement of the lithium storage battery 10 and the substrate when the vehicle on which the power supply system 200 is mounted is located on a horizontal plane.
  • the horizontal direction and the vertical direction are orthogonal to each other, and the vertical direction is along the vertical direction.
  • the lithium storage battery 10 corresponds to a power source.
  • the switch 20 is a semiconductor switch. Specifically, the switch 20 is a MOSFET. The switch 20 is closed when a control signal is input to the gate electrode. Conversely, the switch 20 is opened when no control signal is input.
  • the MOSFET according to the present embodiment is an N-channel type MOSFET. Therefore, the control signal is a Hi level signal. When the control signal is input, the gate voltage becomes Hi level, and the MOSFET is closed. When the control signal is not input, the gate voltage becomes Lo level, and the MOSFET is opened. Note that the gate voltage is a potential difference between the gate electrode and the source electrode.
  • the switch 20 includes a first switch 21, a second switch 22, a third switch 23, and a fourth switch 24. These have at least one open / close section in which two MOSFETs are connected in series. The source electrodes of the two MOSFETs are connected to each other. The gate electrodes of the two MOSFETs are electrically independent. The MOSFET has a parasitic diode. The anode electrodes of the parasitic diodes of the two MOSFETs are connected to each other.
  • the first switch 21 has three opening / closing sections. These three opening / closing sections are connected in parallel. The source electrodes of the three open / close parts are electrically connected to each other.
  • the first switch 21 is provided on the first power supply line 11 that connects the first external terminal 100a and the second external terminal 100b.
  • the electrical connection between the first external terminal 100a and the second external terminal 100b is controlled by controlling the opening and closing of the first switch 21.
  • the electrical connection between the lead storage battery 110 and the rotating electrical machine 120 is controlled by controlling the opening and closing of the first switch 21.
  • the electrical connection between the lead storage battery 110 and the rotating electrical machine 120 is controlled by controlling the opening and closing of the first connection circuit including the first switch 21 and the first power supply line 11.
  • the second switch 22 has four open / close sections. These four open / close sections are connected in parallel. The source electrodes of the four open / close sections are electrically connected to each other.
  • the second switch 22 is provided on the second power supply line 12 that connects the first power supply line 11 and the lithium storage battery 10. One end of the second power supply line 12 is connected between the first switch 21 and the second external terminal 100b in the first power supply line 11. Thereby, the electrical connection between the lithium storage battery 10 and the second external terminal 100b is controlled by controlling the opening and closing of the second switch 22. In other words, the electrical connection between the lithium storage battery 10 and the rotating electrical machine 120 is controlled by controlling the opening and closing of the second switch 22. In other words, the electrical connection between the lithium storage battery 10 and the rotating electrical machine 120 is controlled by controlling the opening and closing of the second connection circuit including the second switch 22 and the second feeder 12.
  • the second switch 22 corresponds to a fifth switch.
  • the third switch 23 has one opening / closing part.
  • the third switch 23 is provided on the third feeder 13 that connects the first feeder 11 and the third external terminal 100c.
  • One end of the third feed line 13 is connected between the first external terminal 100 a and the first switch 21 in the first feed line 11.
  • the electrical connection between the first external terminal 100a and the third external terminal 100c is controlled by controlling the opening and closing of the third switch 23.
  • the electrical connection between the lead storage battery 110 and the electric load 140 is controlled by controlling the opening and closing of the third switch 23.
  • the electrical connection between the lead storage battery 110 and the electrical load 140 is controlled by controlling the opening and closing of the third connection circuit including the third switch 23 and the third feeder 13.
  • the fourth switch 24 has one opening / closing part.
  • the fourth switch 24 is provided on the fourth feed line 14 that connects the third feed line 13 and the second feed line 12.
  • One end of the fourth feeder 14 is connected between the third switch 23 and the third external terminal 100c in the third feeder 13.
  • the other end of the fourth power supply line 14 is connected between the second switch 22 and the lithium storage battery 10 in the second power supply line 12.
  • the electrical connection between the lithium storage battery 10 and the third external terminal 100c is controlled by controlling the opening and closing of the fourth switch 24.
  • the electrical connection between the lithium storage battery 10 and the electric load 140 is controlled by controlling the opening / closing of the fourth switch 24.
  • the electrical connection between the lithium storage battery 10 and the electrical load 140 is controlled by controlling the opening and closing of the fourth connection circuit including the fourth switch 24 and the fourth feeder 14.
  • the fourth switch 24 corresponds to a sixth switch.
  • the bypass relay 30 is a mechanical relay. Specifically, the bypass relay 30 is a normally closed electromagnetic relay. Therefore, the bypass relay 30 is closed when an excitation current is input as a control signal. Conversely, the bypass relay 30 is opened when no excitation current is input.
  • the bypass relay 30 has a first bypass relay 31 and a second bypass relay 32.
  • the first bypass relay 31 is provided in the first bypass line 15 connected in parallel with the first power supply line 11.
  • One end of the first bypass line 15 is connected between the first external terminal 100 a and the first switch 21 in the first power supply line 11.
  • the other end of the first bypass line 15 is connected between the first switch 21 and the second external terminal 100 b in the first power supply line 11.
  • the first bypass relay 31 and the first switch 21 are connected in parallel. Therefore, even if the first switch 21 is in the open state, the electrical connection between the first external terminal 100a and the second external terminal 100b is controlled by controlling the opening and closing of the first bypass relay 31. In other words, the electrical connection between the lead storage battery 110 and the rotating electrical machine 120 is controlled by controlling the opening and closing of the first bypass relay 31.
  • the electrical connection between the lead storage battery 110 and the rotating electrical machine 120 is controlled by controlling the opening and closing of the first bypass circuit including the first bypass relay 31 and the first bypass line 15.
  • the first bypass line 15 is provided with a bypass fuse 33.
  • the bypass fuse 33 and the first bypass relay 31 are connected in series. This bypass fuse 33 is also included in the first bypass circuit.
  • the first bypass relay 31 corresponds to a second switch.
  • the first bypass circuit corresponds to a second connection circuit.
  • the second bypass relay 32 is provided in the second bypass line 16 connected in parallel to the third feeder 13.
  • One end of the second bypass line 16 is connected between the connection end of the third power supply line 13 with the first power supply line 11 and the third switch 23.
  • the other end of the second bypass line 16 is connected between the third switch 23 and the third external terminal 100c in the third feed line.
  • the second bypass relay 32 and the third switch 23 are connected in parallel. Therefore, even if the third switch 23 is in the open state, the electrical connection between the first external terminal 100a and the third external terminal 100c is controlled by controlling the opening and closing of the second bypass relay 32. In other words, the electrical connection between the lead storage battery 110 and the electric load 140 is controlled by controlling the opening and closing of the second bypass relay 32.
  • the electrical connection between the lead storage battery 110 and the electrical load 140 is controlled by controlling the opening and closing of the second bypass circuit including the second bypass relay 32 and the second bypass line 16.
  • the second bypass relay 32 corresponds to a fourth switch.
  • the second bypass circuit corresponds to a fourth connection circuit.
  • the first switch 21 has three opening / closing sections
  • the second switch 22 has four opening / closing sections.
  • Each of the third switch 23 and the fourth switch 24 has one open / close section.
  • the difference in the number of the open / close portions is due to the difference in the amount of current flowing through the connection circuit including each switch. That is, the difference in the number of open / close sections depends on the current resistance required for the connection circuit including each switch (performance to withstand flowing current).
  • the first power supply line 12 provided with the second switch 22 has a current resistance higher than that of the first power supply line 11 provided with the first switch 21.
  • the third feed line 13 and the fourth feed line 14 provided with the third switch 23 and the fourth switch 24 have a current resistance lower than that of the first feed line 11. Therefore, the second connection circuit has a current resistance higher than that of the first connection circuit.
  • the third connection circuit and the fourth connection circuit have a current resistance lower than that of the first connection circuit.
  • the first bypass line 15 provided with the first bypass relay 31 and the bypass fuse 33 has lower current resistance than the first power supply line 12 provided with the first switch 21.
  • the first bypass relay 31 and the bypass fuse 33 are lower in current resistance than the first switch 21. Therefore, the first bypass circuit has a lower current resistance than the first connection circuit.
  • the first bypass line 15 provided with the second bypass relay 32 is lower in current resistance than the first feeder 12.
  • the second bypass relay 32 has a lower current resistance than the first switch 21. Therefore, the second bypass circuit has a lower current resistance than the first connection circuit.
  • the sensor unit 40 detects the state of the lithium storage battery 10 and the switch 20.
  • the sensor unit 40 includes a temperature sensor, a current sensor, and a voltage sensor.
  • the sensor unit 40 detects the temperature, current, and voltage of the lithium storage battery 10.
  • the sensor unit 40 outputs it to the BMU 50 as a state signal of the lithium storage battery 10.
  • the sensor unit 40 detects the temperature, current, and voltage of the switch 20.
  • the sensor unit 40 outputs it to the BMU 50 as a status signal of the switch 20. What detects the physical quantity of the 1st switch 21 (1st connection circuit) among the sensor parts 40 is equivalent to a sensor part.
  • the abnormal state of the first switch 21 has a correlation with the physical quantity detected by the sensor unit 40. For example, if at least one of physical quantities such as voltage, current, and heat detected by the sensor unit 40 is higher than standard values such as standard voltage, standard current, and standard heat that guarantee the operation of the first switch 21, the first It can be seen that the switch 21 is abnormal or just before becoming abnormal.
  • the switch 20 has an open / close section in which the source electrodes of two MOSFETs are connected to each other.
  • the sensor unit 40 detects the temperature and current of the source electrode.
  • the sensor unit 40 detects the voltage across each of the two MOSFETs.
  • the sensor unit 40 may not detect the voltage of the source electrodes of the two MOSFETs. That is, the sensor unit 40 may detect the voltage of the drain electrode of each of the two MOSFETs.
  • the BMU 50 controls the switch 20 and the bypass relay 30 based on at least one of the status signal of the sensor unit 40 and the command signal from the host ECU 150.
  • BMU is an abbreviation for battery management unit.
  • the BMU 50 corresponds to a control unit.
  • the BMU 50 determines the state of charge of the lithium storage battery 10 and the abnormality of the switch 20 based on the state signal of the sensor unit 40.
  • the BMU 50 outputs the determination information to the host ECU 150.
  • the BMU 50 has a first threshold value and a second threshold value as threshold values for determining an abnormal state of the switch 20.
  • the BMU 50 has a first threshold value and a second threshold value corresponding to each of the temperature, current, and voltage. Each of the second threshold values is larger than the corresponding first threshold value.
  • the BMU 50 compares the value indicated by the status signal of the switch 20 with the first threshold value and the second threshold value.
  • the BMU 50 determines the abnormal state of the first switch 21 in particular. In the following, in order to distinguish from the abnormality determination of other switches, a value indicating the state signal of the first switch 21 is referred to as a sensor value.
  • the BMU 50 compares the sensor value with the first threshold value, and compares the sensor value with the second threshold value.
  • the first threshold value and the second threshold value can be determined based on, for example, the above standard values.
  • the first threshold value is lower than the standard value.
  • the second threshold value is equivalent to the standard value. For example, it can be determined in this way.
  • the threshold value can be appropriately determined by those skilled in the art according to the purpose.
  • the BMU 50 may calculate one sensor value for determining the abnormal state of the first switch 21 based on various physical quantities such as temperature, current, and voltage.
  • the BMU 50 has a first threshold value and a second threshold value corresponding to the one sensor value.
  • the first threshold value and the second threshold value may not be fixed values. That is, the first threshold value and the second threshold value vary according to the control signal output to the first switch 21 and the driving state of various electric devices such as the rotating electrical machine 120 and the electric load 140 connected to the battery pack 100. It may be a value. That is, the BMU 50 may store a map corresponding to the threshold value and various state values. The BMU 50 may determine a threshold based on this map and the detected various state values.
  • the BMU 50 compares a plurality of sensor values with the corresponding first threshold value. As a result, when all of the plurality of sensor values are below the corresponding first threshold value, the BMU 50 controls the opening and closing of the switch 20 and the bypass relay 30 based on the command signal from the host ECU 150.
  • the BMU 50 outputs the following request to the host ECU 150.
  • the BMU 50 when the engine 130 is being driven, the BMU 50 outputs a request (restriction request) for limiting the output (requirement output) required for driving the rotating electrical machine 120 to the host ECU 150.
  • a request for limiting the output (requirement output) required for driving the rotating electrical machine 120 to the host ECU 150.
  • the BMU 50 when the engine 130 is stopped due to idle stop, the BMU 50 outputs a request for prohibiting idle stop (idle stop prohibition request) to the host ECU 150.
  • This idle stop prohibition request includes a request to restart the engine 130.
  • the BMU 50 transmits an idle stop prohibition request and electrically connects the lead storage battery 110 and the rotating electrical machine 120. As a result, an AC voltage is supplied to rotating electric machine 120, and engine 130 is restarted.
  • the BMU 50 ignores the command signal from the host ECU 150 and executes fail-safe processing. Specifically, the BMU 50 stops outputting control signals to the switch 20 and the bypass relay 30. As a result, the switch 20 is opened and the bypass relay 30 is closed. As a result, the lead storage battery 110 and the rotating electrical machine 120 are electrically connected via the first bypass circuit including the first bypass relay 31. The lead storage battery 110 and the electrical load 140 are electrically connected via a second bypass circuit including the second bypass relay 32.
  • the current is indicated by a broken line arrow and a dashed line arrow.
  • the amount of current is indicated by the thickness of the line. That is, the larger the current amount, the thicker the line is shown.
  • the sensor unit 40, the BMU 50, the alternate long and short dash line indicating the outer frame of the battery pack 100, and the host ECU 150 are omitted. Further, other components are shown in a simplified manner.
  • the rotating electric machine 120 is in a power running state.
  • the engine 130 is in a combustion driving state.
  • the sensor value is below the first threshold value.
  • the BMU 50 controls the switch 20 and the bypass relay 30 based on a command signal from the host ECU 150. Specifically, the BMU 50 controls each of the second switch 22 and the third switch 23 to be closed. Further, the BMU 50 controls each of the other first switch 21, second switch 22, first bypass relay 31, and second bypass relay 32 to an open state. With the above open / close control, the lead storage battery 110 is electrically connected to the electric load 140 via the third switch 23. The lithium storage battery 10 is electrically connected to the rotating electrical machine 120 via the second switch 22.
  • electric power is supplied from the lithium storage battery 10 to the rotating electrical machine 120 via the second switch 22 as indicated by a broken line arrow.
  • Electric power is supplied from the lead storage battery 110 to the electric load 140 via the third switch 23 as indicated by a one-dot chain line arrow.
  • the required output of the rotating electrical machine 120 is not limited. For this reason, the amount of power supplied to the rotating electrical machine 120 is larger than the amount of power supplied to the electric load 140.
  • the BMU 50 when the sensor value exceeds the first threshold value, the BMU 50 outputs a restriction request to the host ECU 150 while maintaining the open / closed state of the switch 20 and the bypass relay 30. Thereby, the required output of the rotating electrical machine 120 is limited. As a result, the amount of electric power supplied to the rotating electrical machine 120 decreases as shown by the thin broken arrow in FIG.
  • the BMU 50 ignores the command signal from the host ECU 150 and executes fail-safe processing. That is, the BMU 50 stops outputting control signals to the switch 20 and the bypass relay 30. As a result, each of the second switch 22 and the third switch 23 changes from the closed state to the open state. Further, each of the first bypass relay 31 and the second bypass relay 32 changes from the open state to the closed state.
  • the sensor value is below the first threshold value.
  • the BMU 50 controls the switch 20 and the bypass relay 30 based on a command signal from the host ECU 150. Specifically, the BMU 50 controls each of the first switch 21 and the fourth switch 24 to be closed. Further, the BMU 50 controls the other second switch 22, third switch 23, first bypass relay 31, and second bypass relay 32 to the open state. With the above open / close control, the lead storage battery 110 is electrically connected to the rotating electrical machine 120 via the first switch 21. The lithium storage battery 10 is electrically connected to the electric load 140 via the fourth switch 24.
  • electric power is supplied from the lead storage battery 110 to the rotating electrical machine 120 via the first switch 21 as indicated by a broken line arrow.
  • Electric power is supplied from the lithium storage battery 10 to the electric load 140 via the fourth switch 24 as indicated by a one-dot chain line arrow. Since the required output of the rotating electrical machine 120 is not limited, the power supply amount to the rotating electrical machine 120 is larger than the power supply amount to the electric load 140.
  • the BMU 50 When the sensor value exceeds the first threshold value in the state shown in FIG. 5, the BMU 50 outputs a restriction request to the host ECU 150 while maintaining the state of the switch 20 and the bypass relay 30. Thereby, the required output of the rotating electrical machine 120 is limited. As a result, the amount of electric power supplied to the rotating electrical machine 120 decreases as shown by the thin broken arrow in FIG.
  • the BMU 50 ignores the command signal from the host ECU 150 and executes the fail-safe process.
  • this fail-safe process electric power is supplied from the lead storage battery 110 to the rotating electrical machine 120 via the first bypass relay 31 as indicated by the broken-line arrow in FIG. Then, as indicated by a one-dot chain line arrow, electric power is supplied from the lead storage battery 110 to the electric load 140 via the second bypass relay 32.
  • the rotating electrical machine 120 is in a power generation state.
  • the engine 130 is in a combustion driving state.
  • the sensor value is below the first threshold value.
  • the BMU 50 controls the switch 20 and the bypass relay 30 based on a command signal from the host ECU 150. Specifically, the BMU 50 controls each of the first switch 21, the second switch 22, and the fourth switch 24 to be closed. The BMU 50 controls each of the other third switch 23, the first bypass relay 31, and the second bypass relay 32 to be in an open state.
  • the lead storage battery 110 is electrically connected to the rotating electrical machine 120 via the first switch 21.
  • the lithium storage battery 10 is electrically connected to the rotating electrical machine 120 via the second switch 22. Further, the lithium storage battery 10 is electrically connected to the electric load 140 through the fourth switch 24.
  • electric power is supplied from the rotating electrical machine 120 to the lead storage battery 110 via the first switch 21 as indicated by a broken line arrow.
  • Electric power is supplied from the rotating electrical machine 120 to the lithium storage battery 10 via the second switch 22 as indicated by a broken line arrow.
  • electric power is supplied from the lithium storage battery 10 to the electric load 140 via the fourth switch 24. Since the required output of the rotating electrical machine 120 is not limited, the amount of power supplied to each of the lead storage battery 110 and the lithium storage battery 10 is increased.
  • the BMU 50 when the sensor value exceeds the first threshold, the BMU 50 outputs a restriction request to the host ECU 150 while maintaining the state of the switch 20 and the bypass relay 30. Thereby, the electric energy supplied from the rotary electric machine 120 decreases.
  • a decrease in the amount of power supplied from the rotating electrical machine 120 is shown by reducing the thickness of the dashed arrow line.
  • the power generation voltage generated in the rotating electric machine 120 whose output is limited so that the lead storage battery 110 and the lithium storage battery 10 are charged by the power supplied from the rotating electric machine 120 in the power generation state is lead The output voltage of the storage battery 110 and the lithium storage battery 10 is higher.
  • the BMU 50 ignores the command signal from the host ECU 150 and executes fail-safe processing. That is, the BMU 50 stops outputting control signals to the switch 20 and the bypass relay 30. As a result, each of the first switch 21, the second switch 22, and the fourth switch 24 changes from the closed state to the open state. Further, each of the first bypass relay 31 and the second bypass relay 32 changes from the open state to the closed state.
  • the sensor value is below the first threshold value.
  • the BMU 50 controls the first switch 21 and the fourth switch 24 to be closed. Further, the BMU 50 controls the other second switch 22, third switch 23, first bypass relay 31, and second bypass relay 32 to the open state.
  • the BMU 50 when the sensor value exceeds the first threshold value, the BMU 50 outputs an idle stop prohibition request to the host ECU 150.
  • This idle stop prohibition request includes a restart request for the engine 130.
  • the host ECU 150 Upon receiving the idle stop prohibition request, the host ECU 150 puts the rotating electrical machine 120 into a power running state. As a result, the crankshaft of the engine 130 is rotated by the rotating electrical machine 120. Before the sensor value becomes abnormal enough to exceed the second threshold value, power is supplied from the lead storage battery 110 to the rotating electrical machine 120 and the engine 130 is rotated by the rotating electrical machine 120 as shown in FIG. To do.
  • each of the first switch 21, the second switch 22, and the fourth switch 24 changes from the closed state to the open state.
  • each of the first bypass relay 31 and the second bypass relay 32 changes from the open state to the closed state.
  • the BMU 50 transmits a power running of the rotating electrical machine 120 and a power generation prohibition request to the host ECU 150. Even if the power running of the rotating electrical machine 120 and the power generation prohibition request are output at the same time as the fail safe process, a delay time is required until the prohibition request is executed by the host ECU 150, as will be described later with reference to FIG. Arise. Due to this delay time, power running and power generation of the rotating electrical machine 120 are prohibited after the fail-safe process. During the fail-safe process, as shown in FIGS. 4 and 9, the supply current of the rotating electrical machine 120 whose output request is limited flows to the bypass circuit.
  • step S10 the BMU 50 determines whether or not the sensor value exceeds the first threshold value. If the sensor value exceeds the first threshold, the BMU 50 proceeds to step S20. If the sensor value does not exceed the first threshold value, the BMU 50 repeats step S10. That is, until the sensor value exceeds the first threshold, the BMU 50 is in a standby state for processing for the sensor value abnormality.
  • the BMU 50 determines whether or not the engine 130 is being driven. If the engine 130 is being driven, the BMU 50 proceeds to step S30. If the engine 130 is not being driven, the BMU 50 proceeds to step S40.
  • step S30 the BMU 50 outputs a restriction request to the host ECU 150.
  • the required output of the rotating electrical machine 120 is limited by the host ECU 150.
  • the BMU 50 proceeds to step S50.
  • the BMU 50 may determine whether or not the sensor value exceeds the first threshold value again because the sensor value may fall below the first threshold value as time elapses. If the sensor value exceeds the first threshold value, the BMU 50 proceeds to step S60. If the sensor value falls below the first threshold, the BMU 50 proceeds to step S70.
  • step S60 the BMU 50 determines whether or not the sensor value exceeds the second threshold value in order to determine whether or not the sensor value has further increased. If the sensor value exceeds the second threshold value, the BMU 50 proceeds to step S80. If the sensor value does not exceed the second threshold value, the BMU 50 returns to step S50. The BMU 50 maintains the output of the restriction request when the sensor value exceeds the first threshold value.
  • the BMU 50 When proceeding to Step S80, the BMU 50 performs fail-safe processing. That is, the BMU 50 stops outputting control signals to the switch 20 and the bypass relay 30. As a result, the switch 20 is controlled to be in an open state and the bypass relay 30 is controlled to be in a closed state. At this time, the BMU 50 transmits a power running of the rotating electrical machine 120 and a power generation prohibition request to the host ECU 150. Thereafter, the BMU 50 ends the process when the sensor value is abnormal.
  • step S50 when the sensor value falls below the first threshold value in step S50 and proceeds to step S70, the BMU 50 cancels the restriction request. Thereby, the restriction
  • step S20 determines whether or not the vehicle is idling. If it is determined that the vehicle is idling, the BMU 50 proceeds to step S90. If it is determined that the vehicle is not idling, the BMU 50 proceeds to step S100.
  • the BMU 50 When proceeding to step S90, the BMU 50 outputs an idle stop prohibition request to the host ECU 150. As a result, idle stop is prohibited. As described above, the idle stop prohibition request includes a restart request of the engine 130.
  • the BMU 50 transmits an idle stop prohibition request to the host ECU 150 and electrically connects the lead storage battery 110 and the rotating electrical machine 120. Specifically, the BMU 50 closes the first switch 21 and the fourth switch 24 as shown in FIG. As a result, the AC voltage is supplied to the rotating electrical machine 120 while the power supply to the electric load 140 is continued. Then, the engine 130 is restarted. After this, the BMU 50 proceeds to step S110.
  • the BMU 50 may determine whether or not the sensor value exceeds the first threshold value again because the sensor value may fall below the first threshold value as time elapses. If the sensor value exceeds the first threshold, the BMU 50 proceeds to step S120. If the sensor value falls below the first threshold, the BMU 50 proceeds to step S130.
  • the BMU 50 determines whether or not the sensor value exceeds the second threshold value. If the sensor value exceeds the second threshold value, the BMU 50 proceeds to step S80. And BMU50 performs a fail safe process. On the other hand, if the sensor value does not exceed the second threshold value, the BMU 50 returns to step S110. The BMU 50 maintains the output of the restriction request when the sensor value exceeds the first threshold value.
  • step S130 the BMU 50 cancels the idle stop prohibition request. As a result, the prohibition of idle stop is released. After this, the BMU 50 ends the process when the sensor value is abnormal.
  • step S40 determines whether or not the sensor value exceeds the second threshold value. Proceeding to step S100 indicates that the ignition switch is turned on by the user while the vehicle is stopped. When the sensor value exceeds the second threshold value in this vehicle state, the BMU 50 proceeds to step S80. And BMU50 performs a fail safe process. On the other hand, if the sensor value does not exceed the second threshold value, the BMU 50 returns to step S10. In this case, the BMU 50 repeats step S10, step S20, step S40, and step S100, and enters a standby state. When the engine 130 is started by the starter in this standby state, the BMU 50 proceeds to step S30 and outputs a restriction request.
  • FIG. 14 represents an arbitrary unit, and the horizontal axis represents time.
  • the behavior of each signal shown in FIG. 14 is schematically shown in order to explain the fail-safe processing of the BMU 50.
  • the slope representing the amount of change per unit time of each signal has no special meaning and is only schematically shown.
  • This timing chart schematically shows an example in which the sensor value increases linearly with time. It seems that the actual sensor value behavior does not increase linearly in this way. However, to repeat, this is merely a schematic example in which the sensor value increases linearly over time.
  • the timing chart shown in FIG. 14 will be described in detail.
  • the output request of the rotating electrical machine 120 is zero. Therefore, the output of the rotating electrical machine 120 is zero.
  • the sensor value is below the first threshold value. Therefore, the BMU 50 has not transmitted a restriction request.
  • the BMU 50 controls the switch 20 and the bypass relay 30 based on the control signal from the host ECU 150.
  • the BMU 50 controls the second switch 22 and the third switch 23 to be closed based on the control signal from the host ECU 150.
  • the BMU 50 controls the first switch 21, the fourth switch 24, the first bypass relay 31, and the second bypass relay 32 to be in an open state. Therefore, the lead storage battery 110 is electrically connected to the electric load 140 via the third switch 23.
  • the lithium storage battery 10 is electrically connected to the rotating electrical machine 120 via the second switch 22.
  • Electric power is being supplied from the lead storage battery 110 to the electric load 140.
  • the output demand of the rotating electrical machine 120 is zero. Therefore, power supply from the lithium storage battery 10 to the rotating electrical machine 120 is not performed.
  • the output of the lead storage battery 110 is equal to the power supplied to the electric load 140.
  • the output of the lithium storage battery 10 is equal to the power supplied to the rotating electrical machine 120 and is zero. Therefore, the current flowing through the third switch 23 corresponds to the power supplied to the electric load 140.
  • the current flowing through the second switch 22 corresponds to zero.
  • the total current flowing through the second switch 22 and the third switch 23 corresponds to the power supplied to the electric load 140.
  • each of the first bypass relay 31 and the second bypass relay 32 is in an open state. Therefore, the total current flowing through each of the first bypass relay 31 and the second bypass relay 32 is zero.
  • the output demand on the discharge side of the rotating electrical machine 120 becomes finite. Thereby, the rotating electrical machine 120 enters a power running state.
  • the power supplied to the rotating electrical machine 120 gradually increases.
  • the output of the lithium storage battery 10 and the total current of the second switch 22 and the third switch 23 are also gradually increased.
  • the sensor value gradually increases in this timing chart.
  • the sensor value exceeds the first threshold value. If the BMU 50 determines this, it outputs a restriction request to the host ECU 150.
  • the host ECU 150 receives the restriction request, the host ECU 150 starts processing for restricting the output request of the rotating electrical machine 120.
  • the restriction on the output request of the rotating electrical machine 120 by the host ECU 150 is executed after the first delay time has elapsed since the restriction request is output from the BMU 50.
  • the power supplied to the rotating electrical machine 120 starts to gradually decrease due to the limitation of the output request of the rotating electrical machine 120.
  • the output of the lithium storage battery 10 and the total current of the second switch 22 and the third switch 23 also start to gradually decrease.
  • the power supplied to the rotating electrical machine 120 matches the output request of the rotating electrical machine 120.
  • the power supplied to the rotating electrical machine 120 becomes constant.
  • the output of the lithium storage battery 10 and the total current of the second switch 22 and the third switch 23 are also constant.
  • the sensor value further increases. Such an increase in sensor value is assumed to be, for example, a thermal abnormality of the first switch 21.
  • the sensor value exceeds the second threshold value.
  • the BMU 50 determines this, it performs a fail-safe process.
  • the BMU 50 ignores the control signal and stops outputting the control signal to the switch 20 and the bypass relay 30.
  • the switch 20 is opened and the bypass relay 30 is closed.
  • Lead storage battery 110 and rotating electrical machine 120 are electrically connected via first bypass relay 31.
  • the lead storage battery 110 and the electric load 140 are electrically connected via the second bypass relay 32.
  • the output of the lithium storage battery 10 becomes zero.
  • the output of the lead storage battery 110 increases by the amount of power supplied to the rotating electrical machine 120 that the lithium storage battery 10 was carrying.
  • the total current flowing through each of the second switch 22 and the third switch 23 becomes zero.
  • the total current flowing through each of the first bypass relay 31 and the second bypass relay 32 increases.
  • the BMU 50 transmits a power running of the rotating electrical machine 120 and a power generation prohibition request to the host ECU 150 simultaneously with the execution of the fail safe process.
  • the host ECU 150 receives the prohibition request, the host ECU 150 starts a process for prohibiting the driving of the rotating electrical machine 120.
  • the prohibition of driving of the rotating electrical machine 120 is executed after the second delay time has elapsed since the prohibition request was output from the BMU 50.
  • the electric power supplied to the rotating electrical machine 120 gradually decreases due to the prohibition of driving of the rotating electrical machine 120 and approaches zero.
  • the output of the lead storage battery 110 and the total current of the first bypass relay 31 and the second bypass relay 32 also gradually decrease and approach the amount of power supplied to the electric load 140.
  • the sensor value exceeds the first threshold at time t2.
  • the BMU 50 does not output a restriction request. Therefore, the output of the rotating electrical machine 120, the output of the lithium storage battery 10, and the total current of the second switch 22 and the third switch 23 are not reduced.
  • the BMU 50 executes fail-safe processing.
  • the switch 20 is opened and the bypass relay 30 is closed.
  • the lead storage battery 110 is connected to the rotating electrical machine 120 via the first bypass relay 31.
  • the lead storage battery 110 is connected to the electric load 140 through the second bypass relay 32.
  • the BMU 50 transmits a power running of the rotating electrical machine 120 and a power generation prohibition request to the host ECU 150.
  • prohibition of driving of the rotating electrical machine 120 is executed after the second delay time has elapsed since the prohibition request was output from the BMU 50.
  • the lead storage battery 110 supplies power to the rotating electric machine 120 and the electric load 140, respectively.
  • the required output of the rotating electrical machine 120 is not limited. Therefore, as shown in FIG. 15, the supply of electric power from the lead storage battery 110 to the electric load 140 is rapidly reduced. As a result, the supply voltage to the electric load 140 falls below the threshold voltage, and the electric load 140 is turned off.
  • the power supply to the rotating electrical machine 120 whose request output is not limited flows through the first bypass circuit until the second delay time elapses. This may cause damage to the first bypass circuit.
  • the BMU 50 when the sensor value exceeds the first threshold, the BMU 50 outputs a restriction request for restricting the output request of the rotating electrical machine 120 to the host ECU 150.
  • fail-safe processing is executed.
  • the current flowing through the first bypass circuit can be reduced. That is, damage to the first bypass circuit due to the feeding current of the rotating electrical machine 120 in the power generation state or the power running state is suppressed. Therefore, even if the first bypass circuit having a current resistance lower than that of the first connection circuit is employed, damage to the first bypass circuit is suppressed. Since a thing with low electric current resistance can be employ
  • a bypass fuse 33 is included in the first bypass circuit. Therefore, melting of the bypass fuse 33 is suppressed by the supply current of the rotating electrical machine 120 in the power generation state or the power running state.
  • the second bypass circuit is prevented from being damaged by the feeding current from the rotating electrical machine 120 in the power generation state as shown in FIG. Therefore, since the thing with low current resistance can be employ
  • the BMU 50 If the sensor value exceeds the first threshold while the engine 130 is being driven, the BMU 50 outputs a restriction request to the host ECU 150. According to this, it is possible to reduce the current flowing through the first connection circuit in an abnormal state in which the sensor value exceeds the first threshold value. Accordingly, it is possible to suppress a decrease in the life of the first connection circuit.
  • the BMU 50 closes the first connection circuit. Further, the BMU 50 outputs a restart request for the engine 130 to the host ECU 150. As a result, the lead storage battery 110 and the rotating electrical machine 120 are electrically connected via the first connection circuit, and the engine 130 is restarted by the power running of the rotating electrical machine 120. According to this, electric power can be supplied from the lead storage battery 110 to the rotating electrical machine 120 via the first connection circuit in an abnormal state in which the sensor value exceeds the first threshold.
  • the BMU 50 outputs an idle stop prohibition request to the host ECU 150 when supplying power from the lead storage battery 110 to the rotating electrical machine 120 via the first connection circuit in an abnormal state in which the sensor value exceeds the first threshold. According to this, the current for restarting the engine 130 from the lead storage battery 110 to the rotating electrical machine 120 is suppressed from flowing again using the first connection circuit in an abnormal state exceeding the first threshold.
  • the BMU 50 executes a fail safe process and simultaneously transmits a power running of the rotating electrical machine 120 and a power generation prohibition request to the host ECU 150. Thereby, as shown in FIG. 12, it is suppressed that the electric power supply from the lead storage battery 110 to the electric load 140 falls. Therefore, the electrical load 140 is suppressed from being turned off.
  • the BMU 50 performs a restriction request output, an idle stop prohibition request output, and a fail-safe process based on a sensor value indicating an abnormality of the first switch 21 (first connection circuit). Indicated. However, unlike this, even if the abnormality of the battery pack 100 is determined based on the status signal of the sensor unit 40, the output of the restriction request, the output of the idle stop prohibition request, and the implementation of the fail safe process are performed based on the abnormality. Good. In this case, the BMU 50 calculates a detection value indicating an abnormal state of the battery pack 100 based on the state signal of the sensor unit 40. The detected value may be calculated based on various information such as the driving state of the rotating electrical machine 120 input from the host ECU 150 as well as the state signal.
  • the BMU 50 compares the detected value with the corresponding first threshold value. When the detected value exceeds the first threshold, the BMU 50 outputs a restriction request or an idle stop prohibition request to the host ECU 150. And BMU50 performs a fail safe process, when a detected value exceeds the 2nd threshold value corresponding.
  • the state of the battery pack 100 includes the state of the first switch 21.
  • the switch 20 is opened and the bypass relay 30 is closed.
  • the fail-safe process is not limited to the above example.
  • the first switch 21 and the third switch 23 may be closed, and the second switch 22, the fourth switch 24, the first bypass relay 31, and the second bypass relay 32 may be opened.
  • the lead storage battery 110 and the rotating electrical machine 120 are electrically connected via the first switch 21.
  • the lead storage battery 110 and the electrical load 140 are electrically connected via the third switch 23.
  • fail-safe processing may be performed by the BMU 50 based on the determination of the abnormal state of the battery pack 100 as described in the first modified example, for example. Or you may implement a fail safe process based on determination of the abnormal state of the lithium storage battery 10. FIG. Furthermore, the fail safe process may be performed based on the determination of the abnormal state of the second switch 22 and the fourth switch 24 corresponding to the lithium storage battery 10.
  • the second switch 22 and the fourth switch 24 are closed, and the first switch 21, the third switch 23, the first bypass relay 31, and the second bypass relay 32 are opened. Good. According to this, the lithium storage battery 10 and the rotating electrical machine 120 are electrically connected via the second switch 22. The lithium storage battery 10 and the electric load 140 are electrically connected via the fourth switch 24.
  • fail-safe processing may be performed by the BMU 50 based on the determination of the abnormal state of the battery pack 100 as described in the first modified example, for example. Or you may implement a fail safe process based on determination of the abnormal state of the lead storage battery 110. FIG. Furthermore, the fail-safe process may be performed based on the determination of the abnormal state of the first switch 21 and the third switch 23 corresponding to the lead storage battery 110.
  • the fail-safe process is a process in which at least one of the lead storage battery 110 and the lithium storage battery 10 avoids an abnormal energization path and can energize the rotating electrical machine 120 and the electric load 140 respectively. If there is no particular limitation.
  • the BMU 50 may output a restriction request to the host ECU 150 when the sensor value exceeds the first threshold value when the rotating electrical machine 120 is in the driving state. More specifically, the BMU 50 may output a restriction request to the host ECU 150 when the sensor value exceeds the first threshold when the rotating electrical machine 120 is in the power generation state or the power running state. According to this, damage to the bypass circuit due to the feeding current of the rotating electrical machine 120 in the power generation state or the power running state is suppressed.
  • the lead storage battery 110 is connected to the battery pack 100, and the battery pack 100 includes the lithium storage battery 10.
  • the inclusion relationship between the lead storage battery 110 and the lithium storage battery 10 with respect to the battery pack 100 is not limited to the above example.
  • the battery pack 100 can employ a configuration having at least one of a lead storage battery 110 and a lithium storage battery 10.
  • a configuration in which the lead storage battery 110 and the lithium storage battery 10 are connected to the battery pack 100 can also be employed.
  • the battery pack 100 includes two connection circuits that connect the lithium storage battery 110 and the rotating electrical machine 120 may be employed.
  • the roles of these two connection circuits correspond to the first connection circuit and the first bypass circuit shown in the present embodiment. Therefore, one of the two connection circuits has a property of having higher current resistance than the other.
  • the lithium storage battery 110 and the rotating electrical machine 120 are electrically connected via one of the two connection circuits when there is no abnormality.
  • the abnormality exceeds the first threshold, the required output of the rotating electrical machine 120 is limited.
  • the lithium storage battery 110 and the rotating electrical machine 120 are electrically connected via the other of the two connection circuits.
  • the vehicle equipped with the power supply system 200 has the idle stop function.
  • the vehicle equipped with the power supply system 200 is not limited to the above example.
  • the BMU 50 does not perform step S20 in the process when the sensor value is abnormal as shown in FIG. That is, when the sensor value exceeds the first threshold value in step S10, the BMU 50 performs the process of step S30.
  • the BMU 50 may perform the process of step S20. In this case, if the BMU 50 determines in step S20 that the engine 130 is not being driven, the process proceeds to step S100.
  • the switch 20 is a semiconductor switch. However, if the speed of switching the state of the switch from closed to open and open to closed can correspond to the switching of the vehicle state such as switching from the stop to the engine drive, the switch 20 can be a mechanical relay, for example. Can also be adopted.
  • the switch 20 is an MOSFET.
  • the switch 20 is configured by a semiconductor switch, it is not limited to the above example.
  • an IGBT may be employed as the switch 20.
  • the switch 20 is an N-channel MOSFET.
  • a P-channel MOSFET can also be employed as the switch 20.
  • the switch 20 has at least one open / close portion in which two MOSFETs are connected in series is shown.
  • the switch 20 is not limited to the above example.
  • the switch 20 may have one MOSFET.
  • the switch 20 may have a plurality of MOSFETs connected in parallel.
  • the open / close portion is formed by connecting the source electrodes of two MOSFETs.
  • the open / close portion may be formed by connecting drain electrodes of two MOSFETs.
  • the example in which the gate electrodes of the two MOSFETs of the opening / closing unit are electrically independent has been described.
  • a configuration in which the gate electrodes of the two MOSFETs have the same potential can be adopted.
  • the example in which the anode electrodes of the parasitic diodes of the two MOSFETs of the open / close unit are connected to each other has been described.
  • a configuration in which the cathode electrodes of the parasitic diodes are connected to each other may be employed.
  • an IGBT is employed as the switch 20
  • a diode is preferably connected in parallel to the two IGBTs included in the opening / closing unit.
  • the cathode electrodes of the two diodes or the anode electrodes may be connected to each other.
  • the first switch 21 has three opening / closing sections
  • the second switch 22 has four opening / closing sections
  • each of the third switch 23 and the fourth switch 24 has one opening / closing section. showed that.
  • the number of open / close sections included in each switch is not limited to the above example.
  • the example in which the source electrodes of the plurality of open / close sections connected in parallel are electrically connected to each other has been described.
  • the source electrodes of each of the plurality of opening / closing portions may not be electrically connected to each other. Further, some of the source electrodes of the plurality of opening / closing portions may be electrically connected to each other.
  • bypass relay 30 is a mechanical relay.
  • the bypass relay 30 is not limited to the above example.
  • a semiconductor switch may be employed as the bypass relay 30.
  • the second connection circuit has a current resistance higher than that of the first connection circuit, and the third connection circuit and the fourth connection circuit have current resistance lower than that of the first connection circuit.
  • the relation of current resistance of each connection circuit is not limited to the above example.
  • the current resistance of each connection circuit can be appropriately changed according to the current resistance required for each connection circuit.
  • the first bypass circuit has the bypass fuse 33.
  • the first bypass circuit may not have the bypass fuse 33.
  • the battery pack 100 includes the sensor unit 40 that detects the state of the lithium storage battery 10 and the switch 20 has been described.
  • the sensor unit 40 only needs to detect at least the state signal of the first switch 21.
  • the sensor part 40 showed the example which has a temperature sensor, a current sensor, and a voltage sensor. However, the sensor part 40 should just have at least 1 of these.
  • the sensor unit 40 may have other sensors.
  • the sensor unit 40 may include a submergence sensor for detecting submergence of the battery pack 100. This submergence sensor has a capacitor constituted by a counter electrode. If there is water between the counter electrodes, the dielectric constant (capacitance) of the capacitor changes.
  • the BMU 50 detects the submersion of the battery pack 100 based on whether or not the change in the capacitance of the submergence sensor is continued for a predetermined time.
  • the submergence sensor is provided on the bottom side of the housing with respect to the substrate.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Power Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Automation & Control Theory (AREA)
  • General Chemical & Material Sciences (AREA)
  • Biomedical Technology (AREA)
  • Health & Medical Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Secondary Cells (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Control Of Charge By Means Of Generators (AREA)
  • Hybrid Electric Vehicles (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

La présente invention concerne un bloc-batterie qui comprend : un premier circuit de connexion (21, 11) qui connecte une batterie de stockage (110) et une machine électrique rotative (120); un second circuit de connexion (31, 33, 15) qui connecte la batterie de stockage et la machine électrique rotative et présente une résistance au courant qui est inférieure à celle du premier circuit de connexion; une unité de commande (50) qui commande le premier circuit de connexion et le second circuit de connexion; et une unité de capteur (40) qui détecte un état du premier circuit de connexion. L'unité de commande limite une sortie demandée de la machine électrique rotative, lorsqu'une valeur de capteur dépasse une première valeur seuil; et connecte électriquement la batterie de stockage et la machine électrique rotative par l'intermédiaire du second circuit de connexion en plaçant le premier circuit de connexion dans un état ouvert et le second circuit de connexion dans un état fermé, lorsque la valeur de capteur dépasse une seconde valeur seuil.
PCT/JP2017/038658 2016-12-14 2017-10-26 Bloc-batterie et système de source d'alimentation le comprenant WO2018110109A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2016-242324 2016-12-14
JP2016242324A JP2018098935A (ja) 2016-12-14 2016-12-14 電池パック、および、それを含む電源システム

Publications (1)

Publication Number Publication Date
WO2018110109A1 true WO2018110109A1 (fr) 2018-06-21

Family

ID=62558400

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2017/038658 WO2018110109A1 (fr) 2016-12-14 2017-10-26 Bloc-batterie et système de source d'alimentation le comprenant

Country Status (2)

Country Link
JP (1) JP2018098935A (fr)
WO (1) WO2018110109A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7013745B2 (ja) 2017-09-12 2022-02-15 株式会社デンソー 電池パック
TWI805180B (zh) 2021-01-21 2023-06-11 日商紐富來科技股份有限公司 電子線描繪裝置及陰極壽命預測方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0595108U (ja) * 1992-05-29 1993-12-24 三菱自動車工業株式会社 電気自動車用電動機の電池温度上昇時制御
JP2012138278A (ja) * 2010-12-27 2012-07-19 Toyota Motor Corp 電源装置の制御装置および電源装置の制御方法
JP2014030281A (ja) * 2012-07-31 2014-02-13 Denso Corp 電源システム
JP2015149849A (ja) * 2014-02-07 2015-08-20 株式会社デンソー 電池ユニット及び電源システム
JP2015182657A (ja) * 2014-03-25 2015-10-22 富士重工業株式会社 車両用電源装置
JP2015204699A (ja) * 2014-04-15 2015-11-16 株式会社デンソー 電池ユニット

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0595108U (ja) * 1992-05-29 1993-12-24 三菱自動車工業株式会社 電気自動車用電動機の電池温度上昇時制御
JP2012138278A (ja) * 2010-12-27 2012-07-19 Toyota Motor Corp 電源装置の制御装置および電源装置の制御方法
JP2014030281A (ja) * 2012-07-31 2014-02-13 Denso Corp 電源システム
JP2015149849A (ja) * 2014-02-07 2015-08-20 株式会社デンソー 電池ユニット及び電源システム
JP2015182657A (ja) * 2014-03-25 2015-10-22 富士重工業株式会社 車両用電源装置
JP2015204699A (ja) * 2014-04-15 2015-11-16 株式会社デンソー 電池ユニット

Also Published As

Publication number Publication date
JP2018098935A (ja) 2018-06-21

Similar Documents

Publication Publication Date Title
US10967820B2 (en) Power source control device, battery pack, and power source system
US10005365B2 (en) Vehicle power source
US10377245B2 (en) Vehicle power source
US10279761B2 (en) Vehicle power-supply device
WO2015015743A1 (fr) Système de source d'alimentation pour véhicule
JP6215221B2 (ja) 車両用電源装置
JP6260422B2 (ja) 電池ユニット
US10377246B2 (en) Vehicle power source
JP5928177B2 (ja) トルクアシスト制御装置
JP2012130108A (ja) 電源装置
JP2008189090A (ja) 車両用制御装置
RU2668491C1 (ru) Система подачи мощности
JP6760033B2 (ja) 電池パックと電源システム
JPWO2017163959A1 (ja) 電源システム及びその制御方法
JP6654890B2 (ja) 車両用電源装置
JP2015196447A (ja) 車両用電源システム
JP6642496B2 (ja) 電源装置及び電源システム
WO2012104264A2 (fr) Appareil et procédé de gestion de puissance de véhicule
JPWO2018078785A1 (ja) 車両用電源システムの制御方法および車両用電源システム
WO2018110109A1 (fr) Bloc-batterie et système de source d'alimentation le comprenant
JP6331740B2 (ja) 車両用電気回路
JP6617653B2 (ja) 電源装置
WO2018110243A1 (fr) Unité de batterie et système d'alimentation électrique
WO2018066441A1 (fr) Dispositif de commande pour machine électrique rotative
JP6776929B2 (ja) 電池パック

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 17881471

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 17881471

Country of ref document: EP

Kind code of ref document: A1